Super strong and extra long 13-mm hardened steel shackle resists cutting, prying and jacking X2P double bolt locking mechanism locks shackle on both sides Bump-proof Z-Cylinder resists picking, pulling and drilling Double rubber coated crossbar cover protects paint Extra thick molded end caps protects against bumps and hits 5 laser-cut keys (1 micro-light that project a bright white beam) Snap lock quick release multi-position mounting bracket Limited lifetime warranty Attributes Bracket Universal bracket included Internal Lock Size Imperial 3.5''x6.9'' Internal Lock Size Metric 90x175mm Lock Type Key Primary Color Black Thickness In mm 13mm